I did too, my dad ex-RAF made them and told me they were based on a strange ’bomb’ type of thing.They were wooden when we were kids... Two matchsticks, a candle and rubber band, and we used to race them! Simple times !!
Yes... did read and believe there may even be footage of experimental firing, like two giant catherine wheels and totally uncontrollable!!
"Lightly Modified"how do brake upgrades feature on the scale of modifications? I have a sleeved down master cylinder, Norvil fork leg, 12" floating disc, Lockheed alloy caliper etc.
p.s. if my bike was truly original, it would still have a big white fairing, fastback LR tank with a radio tray, a single seat with a rack over the huge mudguards etc. And a chronometric speedo and no tacho.